Application DetailsIHC, WB. A dilution of 1:500-1:1000 is recommended. This antiserum works superbly for staining of paraffin-embedded tissue sections fixed in formalin, frozen sections and cell cytospins. Biosensis recommends optimal dilutions/concentrations should be determined by the end user.
SpecificityThis antiserum reacts with human myeloperoxidase. Human
Target Host SpeciesHuman
Immunogen DescriptionMyeloperoxidase isolated from human polymorphonuclear leucocytes
Reconstitution InstructionsSpin vial briefly before opening. Reconstitute in 250 µL sterile-filtered 1X PBS, pH 7.2-7.6. Centrifuge to remove any insoluble material.
Storage InstructionsAfter reconstitution keep aliquots at -20°C for a higher stability, and at 2-8°C with an appropriate antibacterial agent. Avoid repetitive freeze/thaw cycles. Glycerol (1:1) may be added for an additional stability.
Batch NumberPlease see item label.
Expiration Date12 months after date of receipt (unopened vial).
Scientific BackgroundFUNCTION: Part of the host defense system of polymorphonuclear leukocytes. It is responsible for microbicidal activity against a wide range of organisms. In the stimulated PMN, MPO catalyzes the production of hypohalous acids, primarily hypochlorous acid in physiologic situations, and other toxic intermediates that greatly enhance PMN microbicidal activity. MPO is an important marker for myeloid cells, from the promyelocyte stage and to the mature forms. CATALYTIC ACTIVITY: Donor + H2O2 = oxidized donor + 2 H2O. CATALYTIC ACTIVITY: Cl- + H2O2 = HOCl + 2 H2O. COFACTOR: Binds 1 calcium ion per heterodimer. COFACTOR: Binds 1 heme B (iron-protoporphyrin IX) group covalently per heterodimer. SUBUNIT: Tetramer of two light chains and two heavy chains. SUBCELLULAR LOCATION: Lysosome. ALTERNATIVE PRODUCTS: 3 named isoforms produced by alternative splicing. DISEASE: Defects in MPO are the cause of myeloperoxidase deficiency (MPD). MPD is an autosomal recessive defect that results in disseminated candidiasis. SIMILARITY: Belongs to the peroxidase family. XPO subfamily. Microglia and astrocytes are known to express MPO as well.